template<class E, class T> class partial_grid_function;
| Parameter | Description | Default |
| E | the element type | |
| T | the value type | |
a_grid_type g;
typedef grid_types<a_grid_type> gt;
grid_function_vector<gt::Edge, double> length(g);
for(gt::EdgeIterator e(g); ! e.IsDone(); ++e)
length[*e] = distance(geom.coord((*e).V1()),
geom.coord((*e).V2()));